FNUS75 KMSO 111637
FWSMSO

SPOT FORECAST FOR PETTY ROCK  500
NATIONAL WEATHER SERVICE MISSOULA MT
1037 AM MDT WED APR 11 2012

FORECAST IS BASED ON IGNITION TIME OF 1230 MDT ON APRIL 11.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...CONDITIONS FOR THE REMAINDER OF THIS MORNING AND
INTO THE FIRST PART OF THE AFTERNOON WILL BE SIMILAR TO
YESTERDAYS VALUES. LOTS OF HIGH CLOUDS...ELEVATED RELATIVE
HUMIDITIES...WARM TEMPERATURES AND NOT MUCH WIND THROUGH MID-
AFTERNOON. THE SURFACE-BASED INVERSION IS NOT EXPECTED TO MIX OUT
UNTIL MID-AFTERNOON. THEN CONDITIONS WILL CHANGE QUICKLY AS A
FRONT MOVES THROUGH THE AREA BETWEEN 1600-1700 MDT...WHEN THE
POTENTIAL FOR SHOWERS/THUNDERSTORMS AND GUSTY WINDS COME INTO
PLAY.

.CONDITIONS AT IGNITION 1230 MDT...

SKY/WEATHER.........LOTS OF HIGH CLOUDS...FILTERED SUNSHINE.
CWR.................0 PERCENT.
TEMPERATURE.........BOTTOM 64-66...AND TOP 60-62.
HUMIDITY............BOTTOM 33-35 PERCENT...AND TOP 35-38 PERCENT.
WIND (20 FT)........SOUTH 3-5 MPH. GUSTS 7 MPH AT TOP OF BURN.

.REMAINDER OF AFTERNOON...

SKY/WEATHER.........INCREASING CLOUDS. CHANCE OF RAIN SHOWERS AND
                    THUNDERSTORMS AFTER 1600 MDT.
CWR.................20 PERCENT.
MAX TEMPERATURE.....71-73 BOTTOM...AND TOP 66-68.
MIN HUMIDITY........24-26 PERCENT BOTTOM...AND TOP 28-31 PERCENT.
WIND (20 FT)........SOUTH 3-6 MPH. GUSTS TO 9 MPH AT TOP OF BURN.
                    AFTER 1600 MDT...SOUTH 6-12 MPH WITH GUSTS UP TO
                              30 MPH WITH THUNDERSTORMS.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........SOUTHEAST 15 MPH.

.TONIGHT...

SKY/WEATHER.........RAIN SHOWERS.
CWR.................80 PERCENT.
MIN TEMPERATURE.....35-40.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........WEST WINDS 8-13 MPH.
MIXING HEIGHT.......2000 FT AGL.
MIXING WINDS........WEST 10 MPH.

$$
FORECASTER...MSJ
REQUESTED BY...BROTHERS
TYPE OF REQUEST...PRESCRIBED
.TAG 20120411.PETTY.01/MSO